The vitamin D3 requirement of broiler breeders

Poultry Science
A AtencioG O Ware

Abstract

An experiment was conducted with 25- to 66-wk-old Ross broiler breeders in an environment excluding ultraviolet light to determine the cholecalciferol (D3) requirements for hen day egg production; hatchability; body weight of the progeny at 1 d; embryo mortality during the early (1 to 10 d of incubation), middle (11 to 15 d of incubation), and late stages (16 to 21 d of incubation) of development; egg weight; specific gravity; and body ash of the progeny at 1 d of age. Five levels of vitamin D3 (125, 250, 500, 1,000, and 2,000 IU/kg of diet) were fed to hens from 25 to 66 wk of age. One additional group was fed no supplemental D3 until 36 wk of age and was then changed to 4,000 IU/kg of diet. Separate regression analyses were performed for wk 27 to 36 (peak original design) and for wk 37 to 66 (postpeak production modified design). The D3 levels for the predicted maximum hen day egg production during peak and postpeak were 1,424 and 2,804 IU/kg, respectively. The D3 levels for the predicted maximum hatchability were 1,390 IU/ kg (peak) and 2,708 IU/kg (postpeak). The level of D3 that resulted in the minimum early embryo mortality was 1,288 IU/kg at peak; however, no significant effect was observed at postpeak. The D3 levels for...Continue Reading

Citations

Jul 29, 2016·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Sarah J Woodhouse, Markus Rick
Jan 1, 2008·The Veterinary Clinics of North America. Exotic Animal Practice·Ricardo de Matos
Mar 9, 2011·Public Health Nutrition·Hartmut H Glossmann
Jan 1, 2018·The Journal of Poultry Science·Zhouzheng RenKeying Zhang

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